1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your JEGS LS Dual Valve Spring and Retainer Kit. This kit is designed to enhance the performance of LS series cylinder heads by allowing for higher lift camshafts and improving valvetrain stability at elevated engine speeds. Adherence to these instructions is crucial for optimal performance and longevity of the components.
2. Safety Information
Always prioritize safety when working on automotive components. Failure to follow safety precautions can result in serious injury or damage to the vehicle.
- Wear appropriate personal protective equipment, including eye protection and gloves.
- Ensure the engine is cool and the vehicle is securely supported on jack stands before beginning any work.
- Disconnect the vehicle's battery to prevent accidental starting or electrical shorts.
- Relieve fuel system pressure if working near fuel lines.
- Use only appropriate tools for the task, such as a valve spring compressor.
- If you are not confident in your ability to perform the installation, seek assistance from a qualified automotive technician.
3. Package Contents
Verify that all components listed below are present and undamaged before beginning installation.
This image displays all components included in the JEGS LS Dual Valve Spring and Retainer Kit. Visible are two sets of valve springs, one assembled with a retainer and base, and another set of springs. Also shown are individual titanium retainers, small machined locks, machined hardened steel spring bases, and blue Viton valve seals.
- (16) Dual Valve Springs
- (16) Titanium Retainers
- (32) 7 Degree Machined Locks
- (16) Machined Hardened Steel Spring Bases
- (16) Viton Valve Seals
4. Specifications
Detailed technical specifications for the JEGS LS Dual Valve Spring and Retainer Kit.
| Component | Specification |
|---|---|
| Valve Spring Type | Dual Valve Spring with Damper |
| Spring Weight | 95.4g (each) |
| Spring Pressure (Installed) | 140 lbs @ 1.800" |
| Spring Pressure (Open) | 385 lbs @ 1.150" |
| Coil Bind | 1.100" |
| Maximum Lift | 0.650" |
| Retainer Material | Titanium |
| Retainer Weight | 11.4g (each) |
| Retainer Angle | 7 degrees |
| Spring Base (Locator) OD | 1.25" |
| Spring Base (Locator) ID | 0.505" |
| Spring Base (Locator) Thickness | 0.06" |
| Spring Base (Locator) Weight | 10.2g (each) |
| Locks Weight | 2.8g (each) |
| Locks Compatibility | For 8mm Valve Stem |
| Application | Ideal for stock to moderately modified LS1, LS2, LS3, and LS6 cylinder heads. Works with stock and aftermarket rocker arms. |
| Manufacturer Part Number | 514122 |
5. Installation (Setup)
Installation of valve springs and retainers requires specialized tools and knowledge. Professional installation is highly recommended.
Required Tools:
- Valve spring compressor tool (specific to LS engines)
- Torque wrench
- Socket set and wrenches
- Piston stop or compressed air source (to hold valves closed)
- Clean rags and cleaning solvent
- Assembly lubricant
Installation Steps:
- Preparation: Ensure the engine is cool. Disconnect the battery. Remove valve covers, rocker arms, and pushrods.
- Valve Retention: Bring the piston of the cylinder you are working on to Top Dead Center (TDC) or use a piston stop tool. Alternatively, apply compressed air to the spark plug hole to hold the valves closed.
- Remove Old Components: Using a valve spring compressor, compress the existing valve spring assembly. Carefully remove the valve locks, retainers, and springs. Remove the old valve seal.
- Clean and Inspect: Thoroughly clean the valve stem, valve guide, and cylinder head spring seat area. Inspect for any damage or wear.
- Install New Valve Seals: Carefully slide the new Viton valve seals over the valve stem and seat them firmly onto the valve guide. Use a valve seal installation tool if available to prevent damage.
- Install Spring Bases: Place the new machined hardened steel spring bases onto the cylinder head spring seat. Ensure they are properly centered.
- Install Valve Springs: Place the dual valve springs onto the spring base. Ensure the damper (inner spring) is correctly seated within the outer spring.
- Install Retainers and Locks: Place a titanium retainer over the valve spring. Compress the spring assembly using the valve spring compressor. Carefully insert the two 7-degree machined locks into the valve stem groove, ensuring they seat correctly within the retainer. Slowly release the spring compressor, verifying that the locks remain seated.
- Repeat: Repeat steps 2-8 for all remaining valves.
- Reassembly: Reinstall pushrods, rocker arms, and valve covers. Ensure all components are torqued to manufacturer specifications.
- Final Checks: Reconnect the battery. Start the engine and check for proper operation and any unusual noises.
6. Operation
The JEGS LS Dual Valve Spring and Retainer Kit functions as a critical component of your engine's valvetrain. The dual spring design provides increased spring pressure and stability compared to single springs, which is essential for engines operating with higher lift camshafts or at higher RPMs. The springs ensure that the valves close properly and quickly, preventing valve float, which can lead to a loss of power and potential engine damage. The titanium retainers reduce valvetrain mass, further enhancing high-RPM stability and responsiveness.
7. Maintenance
Proper maintenance of your engine's valvetrain components contributes to their longevity and performance.
- Regular Inspection: Periodically inspect valve springs, retainers, and locks for signs of wear, fatigue, or damage during routine engine maintenance.
- Oil Changes: Adhere to recommended engine oil change intervals and use high-quality engine oil to ensure proper lubrication of valvetrain components.
- Avoid Over-revving: While designed for higher RPMs, consistently exceeding the engine's safe operating range can accelerate wear on valvetrain components.
- Cleanliness: Keep the engine bay clean to prevent contaminants from entering the valvetrain.
8. Troubleshooting
If you experience issues after installation, consider the following common troubleshooting steps:
- Excessive Valvetrain Noise: Check for proper rocker arm lash (if adjustable), ensure all components are torqued to specification, and inspect for any loose or worn parts. Verify correct pushrod length.
- Engine Misfire or Loss of Power: This could indicate valve float. Re-verify spring installed height and ensure maximum lift is not exceeded. Inspect springs for breakage or fatigue.
- Oil Consumption: If related to valve seals, ensure they were installed correctly and are not damaged.
- Difficulty Starting: Ensure all electrical connections are secure and that no components are interfering with valve movement.
If troubleshooting does not resolve the issue, consult a qualified automotive technician or contact JEGS customer support.
9. Warranty and Support
For specific warranty information regarding your JEGS LS Dual Valve Spring and Retainer Kit, please refer to the official JEGS website or contact their customer service department directly. Warranty terms and conditions may vary.
JEGS Customer Support:
- Website: www.jegs.com
- Contact Information: Refer to the 'Contact Us' section on the JEGS website for phone numbers and email support.
